docs: def create_and_add(self, key, value=None, cas=0, **options):
          """
          Creates and adds an item.
          :param key: The key to use for the item
          :param value: The value to use for the item
          :param options: Additional operation-specific options
          """
          itm = Item(key, value)
          itm.cas = cas
          return self.add(itm, **options)